.page-about {
  --ab-rail: 178px;
  --ab-ink-soft: rgba(244, 235, 220, .78);
  --ab-ink-mute: rgba(244, 235, 220, .62);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 5vw, 54px) 0 clamp(30px, 5vw, 62px);
  background: linear-gradient(180deg, rgba(14, 26, 60, .92), rgba(7, 11, 30, 0) 88%);
  border-bottom: 2px solid var(--line);
}

.page-about .about-hero__kicker {
  margin: 22px 0 14px;
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(29px, 6vw, 58px);
  line-height: 1.06;
  letter-spacing: -.012em;
  color: var(--cream);
  max-width: 20ch;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.8;
  color: rgba(244, 235, 220, .82);
}

.page-about .about-facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-sm);
}

.page-about .about-facts__i {
  background: var(--panel);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-facts__v {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.1;
  letter-spacing: .04em;
  color: var(--yellow);
}

.page-about .about-facts__k {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

/* ---------- 年刊双栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-block: clamp(30px, 5vw, 64px) clamp(40px, 6vw, 80px);
}

/* ---------- 左侧年份刻度 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__cap {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--muted);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border: 2px solid var(--line-strong);
  border-left: 3px solid var(--cyan);
  background: var(--panel);
  color: var(--cream);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .16s ease, transform .16s ease, box-shadow .16s ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--yellow);
}

.page-about .about-rail__note {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 画板区块 ---------- */
.page-about .about-stream {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 4vw, 46px);
}

.page-about .ab-sec {
  padding-top: clamp(24px, 3.6vw, 38px);
  border-top: 2px solid var(--line);
}

.page-about .ab-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .ab-sec--panel,
.page-about .ab-sec--paper {
  border: 2px solid var(--line-strong);
  padding: clamp(20px, 3.4vw, 38px);
  box-shadow: var(--shadow);
  margin-top: 0;
}

.page-about .ab-sec--panel {
  background: var(--panel);
}

.page-about .ab-sec--paper {
  background: var(--cream);
  border-color: var(--ink);
  color: var(--ink);
}

.page-about .ab-sec__head {
  margin-bottom: 16px;
}

.page-about .ab-sec__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .ab-sec--paper .ab-sec__num {
  color: var(--red);
}

.page-about .ab-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.1vw, 32px);
  line-height: 1.18;
  letter-spacing: -.006em;
  color: var(--cream);
}

.page-about .ab-sec--paper .ab-sec__title {
  color: var(--ink);
}

.page-about .ab-sec__text {
  margin: 0 0 4px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ab-ink-soft);
}

.page-about .ab-sec--paper .ab-sec__text {
  color: #3A2E22;
}

.page-about .ab-sec__body--split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.page-about .prose--paper p {
  color: #3A2E22;
  line-height: 1.85;
}

.page-about .ab-sec__banner {
  margin-top: 22px;
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(23, 224, 200, .05));
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 26px 34px;
  outline-offset: 4px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border: 2px solid var(--cyan);
  background: var(--void);
  transform: rotate(45deg);
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .16em;
  color: var(--yellow);
  margin-bottom: 6px;
}

.page-about .tl__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.3vw, 21px);
  line-height: 1.32;
  color: var(--cream);
}

.page-about .tl__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

.page-about .tl__pop {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .25s ease, opacity .25s ease, margin-top .25s ease;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .tl__item:hover .tl__pop,
.page-about .tl__item:focus-within .tl__pop,
.page-about .tl__item:focus .tl__pop {
  max-height: 64px;
  opacity: 1;
  margin-top: 10px;
}

/* ---------- 团队表格 ---------- */
.page-about .ab-table-wrap {
  margin-top: 20px;
  overflow-x: auto;
  border: 2px solid var(--line-strong);
  background: rgba(7, 11, 30, .55);
}

.page-about .ab-table {
  width: 100%;
  min-width: 580px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .ab-table caption {
  caption-side: top;
  text-align: left;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-table th,
.page-about .ab-table td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.72;
}

.page-about .ab-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .14em;
  color: var(--cyan);
  border-bottom: 2px solid var(--line-strong);
}

.page-about .ab-table tbody th {
  font-weight: 600;
  color: var(--cream);
  white-space: nowrap;
  transition: color .16s ease;
}

.page-about .ab-table tbody td {
  color: var(--ab-ink-soft);
}

.page-about .ab-table tbody td.num {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--yellow);
  white-space: nowrap;
}

.page-about .ab-table tbody tr {
  transition: background-color .16s ease;
}

.page-about .ab-table tbody tr:hover {
  background: rgba(23, 224, 200, .09);
}

.page-about .ab-table tbody tr:hover th {
  color: var(--cyan);
}

.page-about .ab-table tbody tr:last-child th,
.page-about .ab-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 数据合作卡片 ---------- */
.page-about .ab-cards {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-card {
  border: 2px solid var(--line-strong);
  background: var(--panel);
  padding: 18px 18px 20px;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}

.page-about .ab-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow);
}

.page-about .ab-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-about .ab-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.3;
  color: var(--cream);
}

.page-about .ab-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ab-ink-soft);
}

/* ---------- 承诺名录 ---------- */
.page-about .ab-promise {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line-strong);
}

.page-about .ab-promise__i {
  background: var(--panel);
  padding: 16px 18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .ab-promise__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--cyan);
}

.page-about .ab-promise__v {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

/* ---------- 下一步 ---------- */
.page-about .ab-next {
  border: 2px solid var(--cyan);
  background: rgba(23, 224, 200, .05);
  padding: clamp(20px, 3.4vw, 34px);
}

.page-about .ab-next__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.7vw, 26px);
  line-height: 1.25;
  color: var(--cream);
}

.page-about .ab-next__text {
  margin: 0 0 20px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

.page-about .ab-next__row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 0;
}

.page-about .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--line-strong);
  background: var(--void);
}

.page-about .ab-sec--paper .figure__img {
  border-color: var(--ink);
}

.page-about .figure__cap {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .ab-sec--paper .figure__cap {
  color: var(--muted-paper);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .ab-sec__body--split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 30px;
  }

  .page-about .ab-promise__i {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: start;
    gap: 14px;
  }

  .page-about .ab-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .about-rail__link {
    white-space: normal;
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .ab-card,
  .page-about .ab-table tbody tr,
  .page-about .tl__pop {
    transition: none;
  }

  .page-about .about-rail__link:hover,
  .page-about .ab-card:hover {
    transform: none;
  }
}
<<<END>>>